Grout is porous, light-colored and sits slightly below the tile — a perfect trap for dirt, spills and mildew. The good news: you don't need to scrub on your hands and knees for hours. The secret to clean grout is letting the right product dwell so it breaks down the grime for you. Here's how to clean tile grout the easy way, plus how the pros get results that last.
What You'll Need
- Baking soda and water (or an oxygen-based / oxygen-bleach grout cleaner)
- A stiff nylon grout brush or an old toothbrush
- Warm water and clean microfiber cloths
- Optional: a steam cleaner and a grout sealer
Skip vinegar and other acids on natural stone (marble, travertine) or unsealed grout — acid etches stone and slowly erodes grout. Use a pH-neutral or oxygen-based cleaner instead.
Step-by-Step: Clean Grout With Minimal Scrubbing
- Sweep and pre-clean. Vacuum or sweep the floor and wipe the tile so you're working on clean surfaces.
- Apply the cleaner. Spread a baking-soda-and-water paste or an oxygen-based cleaner along the grout lines until they're covered.
- Let it dwell 5–10 minutes. This is the step everyone skips — dwell time lets the product break down the dirt so you barely have to scrub.
- Agitate lightly. Run a grout brush along the lines. Let the product work; don't grind away at it.
- Rinse and dry. Wipe with warm water and a clean cloth, then dry. Repeat on stubborn spots or step up to a stronger oxygen cleaner.
- Seal it. Once fully dry, apply a grout sealer to protect the lines and make the next cleaning far easier.
Cleaning Shower & Wall Grout (and Mildew)
Shower grout deals with constant moisture, so mildew is the main enemy. Apply an oxygen-based cleaner or a dedicated mold-and-mildew product, let it dwell, agitate and rinse. To prevent it coming back, squeegee the walls after showers, run the exhaust fan, and keep the grout sealed. In Central Texas, hard water also leaves mineral scale on shower grout and tile — a limescale-focused step may be needed.
How Professionals Clean Grout
When grout is deeply stained or you have a large tile area, professionals get results hand-cleaning can't. They pre-treat with a commercial alkaline cleaner, let it dwell, then use high-pressure hot-water extraction or a rotary tile-and-grout machine that scrubs and vacuums at the same time, pulling dirt out of the porous grout. They finish by sealing — which is why professional results last far longer. This is part of our floor care and tile & grout service, and it's often included in a full deep cleaning.
When to Call a Pro
- Grout is deeply stained or discolored despite home cleaning
- Large tile areas — whole floors, big kitchens, commercial spaces
- Natural stone that needs safe, pH-correct products
- You want the grout professionally sealed to stay clean longer
- Move-in / move-out or a listing where the floors must look their best
Frequently Asked Questions
How do you clean grout without scrubbing?
Let the cleaner do the work: apply an oxygen-based grout cleaner or baking-soda paste, let it dwell 5–10 minutes so it breaks down the dirt, then wipe and rinse with only light brushing. Steam cleaning also lifts grime with almost no scrubbing, and sealing afterward keeps grout cleaner longer.
What is the best cleaner for grout?
For everyday dirt, a baking-soda-and-water paste or an oxygen-based cleaner works well and is safe on most grout. Avoid acidic cleaners like vinegar on natural stone or unsealed grout. For heavy shower mildew, use a dedicated mold-and-mildew product.
How do professionals clean grout?
They pre-treat with a commercial alkaline cleaner, let it dwell, then use high-pressure hot-water extraction or a rotary tile-and-grout machine that scrubs and vacuums at once, reaching deep into the porous grout — and finish by sealing it.
Should I seal grout after cleaning it?
Yes. Grout is porous and absorbs dirt and moisture. Sealing after a thorough cleaning keeps it looking clean longer and makes routine cleaning easier. Reapply sealer every one to two years.